LIFTING APPLIANCES JULY 2007

Transcription

1 GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES JULY 2007 NOTICE NO. 8 November 2011 The following Rule Changes become EFFECTIVE AS OF 1 NOVEMBER (See for the consolidated version of the Guide for Certification of Lifting Appliances 2007, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction. (See 1-3/7.1.) SECTION 1 GENERAL 9 Definitions (Add new Paragraph 2-1/9.23, as follows.) 9.23 Personnel Lifting (1 November 2011) Lifting of Personnel may consist of: i) Transfer of personnel between installations or vessels ii) Access to work positions SECTION 2 STRUCTURAL REQUIREMENTS 5 Loads and Stresses (Revise Paragraph 2-2/5.19, as follows.) 5.19 Crane Capacity Rating Chart (1 November 2011) For Shipboard and Heavy Lift Crane (2-2/7 and 2-2/11) approved for varying capacities, the Safe Working Load ratings are to be indicated for every increment not exceeding 1.5 m (5 ft), or corresponding boom angles for the specified boom and jib length. An approved copy of the crane capacity rating chart will be included in the Register of Lifting Appliances and is to be furnished to the Owner for use by crane personnel. See 2-5/3.11. For Offshore Crane capacity rating chart requirements, see 2-2/9.9. For capacity rating chart requirements of cranes used for personnel lifting, see Chapter 2, Section 9. ABS GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES

2 SECTION 4 WIRE ROPE (Revise Subsection 2-4/3, as follows.) 3 Factors of Safety (1 November 2011) The breaking strength of the wire rope is not to be less than the calculated maximum tension in the rope multiplied by a factor for the appropriate crane in 2-2/7, 2-2/9 and 2-2/11. For cranes used for personnel lifting see Chapter 2, Section 9. SECTION 6 CONSTRUCTION STANDARDS FOR CRANE MACHINERY, PIPING AND ELECTRICAL SYSTEMS (Revise Subsection 2-6/15, as follows.) 15 Fail-safe Arrangements, Safety Devices and Brakes (1 November 2011) Fail-safe arrangements and safety devices are to be provided and are to be approved by ABS. Brakes are to be provided for all winches and are to be effective in stopping and holding the test load of the crane in any position. Fail-safe arrangements, safety devices and brakes are to be in accordance with applicable recognized industry standards such as API Spec. 2C or EN For cranes used for personnel lifting, see Chapter 2, Section 9. SECTION 7 SURVEYS 7 Annual Survey (1 November 2011) (Revise third bullet of Subsection 2-7/7, as follows.) After undergoing the original test and examination required by 2-5/3, each crane is required to undergo an Annual Survey at intervals of 12 months. The Annual Survey should include the following: Visual inspection of the crane structure for deformation, excessive wear, corrosion, damage or fractures, as necessary. The boom is to be lowered for this examination. Visual examination of crane hooks for deformation, excessive wear or fractures. Nondestructive testing of crane hooks for fractures is to be carried out on all cranes used in the Offshore Drilling, Production and Construction industry and any crane used for personnel lifting. Visual external examination and operational test of crane machinery including prime mover, clutches, brakes; hoisting, slewing and luffing machinery. Visual inspection of wire rope including end attachments. 2 ABS GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES. 2007

3 The slewing ring assembly, where applicable, is to be examined for slack bolts, damaged bearings and deformation or fractured weldments. Rocking Tests, in accordance with the bearing manufacturer s instructions, are to be taken every six months. The results of these tests are to be recorded in the Register of Lifting Appliances for review by the attending surveyor at each annual survey. Functional tests including main and auxiliary load hoisting and lowering, boom raising and lowering, slewing (swinging), safety protective (fail-safe) and limiting devices and load and boom angle or radius indicators. 13 Repairs and Alterations (Revise Paragraph 2-7/13.1, as follows.) 13.1 Crane Structure, Booms and Permanent Fittings (1 November 2011) When repairs or renewals, including welding and or replacement of major structural components are required to be made to the Primary or Secondary load bearing structures or permanent fittings of cranes, the repairs are to be carried out to the satisfaction of the Surveyor. Any welding is to be done by an approved procedure. Tests and examination of the crane are to be carried out in accordance with 2-5/3, but a dynamometer or load cell may be used in lieu of weights. Examples of Primary or Secondary Load bearing structures are: i) Booms, or jibs including chords and bracing ii) Center post, gantry, mast or A -frame iii) Pedestal iv) Foundation v) Revolving upper structure vi) Swing circle assembly vii) Pins and sheaves viii) Load blocks, lower and upper ix) Eye plates and brackets SECTION 9 PERSONNEL LIFTING (1 November 2011) 1 General (Add new Chapter 2, Section 9, as follows.) Cranes intended for lifting or moving of personnel shall be equipped with the specific features given in the subsequent paragraphs, in addition to the other requirements of this Guide. 3 Personnel Rated Loads A load chart is to be provided specifically for Personnel Lifts. The rated load when handling personnel shall be the least of: i) Thirty-three percent of the calculated SWL for non-personnel load ratings. ABS GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES

4 ii) Maximum load based on load line reeving and wire rope design factors as per 2-9/5. iii) Maximum load based on load hoist line pull available considering line reeving losses with manufacturer s design reeving for a load at the boom tip. The published load chart rated load shall be reduced from the above calculated rated loads by the weight of the hook and block excluding the load hoist rope. The personnel net or basket shall be considered part of the load. The personnel rating of the crane shall be supplied on the load chart for all working radii. 5 Personnel Hoist System The wire rope safety factor of load hoist wire rope when handling personnel shall not be less than 10. The personnel rating design factor of the load block is to be not less than 12, based on the load block minimum plastic failure load. The load block used for personnel lifting is to be permanently marked with the maximum safe working load to be used for lifting personnel. The latch of hooks used for personnel lifting is to be lockable. 7 Secondary Brake In addition to the normal brakes, hoisting and luffing winches shall be equipped with a mechanically and operationally independent secondary brake, with separate control circuits. The secondary brake shall preferably act directly on the winch drum but a fully independent load path will be considered on a case by case basis. Means shall be provided for the user to conduct an individual test of the secondary brake. The secondary brake shall fulfill the requirements given in 2-6/15 for the rated capacity for lifting of personnel. 9 Cylinders Where cylinders are used for lifting, folding or telescoping, they shall be provided with a mechanical brake. Brakes based on hydraulic restrictions, such as shut off valves, etc. shall be capable of withstanding pressure shocks due to brake impacts. Fluid loss prevention shall be provided. Alternatively each motion shall have two independent cylinders where each cylinder is independently capable of holding the rated capacity for personnel lifting. 11 Mode Selection for Personnel Lifting The control station shall be equipped with a manual key selection switch for the purpose of lifting personnel. The switch shall be lockable in both the personnel lift mode and cargo lift mode positions with a removable key and have an adjacent warning light continuously indication when it is activated. The key may only be removed in normal operation (no personnel lifting). The light shall not illuminate unless selection for personnel lifting is made. Selection of modes shall only be possible without load on the hook. When the mode for personnel lifting is selected, the following functions shall be maintained: i) All brakes shall automatically be activated when the controls are in neutral position and in case of emergency stop being activated or the event of power failure. ii) All automatic overload protection systems and manual overload protection systems are to be overridden and locked out. iii) Where fitted, active heave compensation systems, active rope tensioning systems, passive heave compensation systems and passive rope tensioning systems shall be overridden and locked out, unless the heave compensation systems are specifically designed for personnel lifting. 4 ABS GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES. 2007

5 13 Personnel Rescue Cranes designed for the lifting of personnel shall have emergency means for the recovery of the lifted personnel from any position. In the event of power failure or control system failures, means shall be provided for a controlled slew, luff down and lowering operation to land the personnel safely. Means shall provide controlled lowering and stopping of the hoist drum under all load conditions. A secondary power supply system and an independent control system for all main functions (i.e., hoist, luff and slew) may be used for this purpose. The manual activation switches or handles for the emergency operation system shall be of a hold to run type and clearly and permanently marked for their purpose. An instruction plate giving detailed instructions shall be provided at the operator s station for all procedures. 15 Structural Design Criteria Providing a substantially increased structural safety margin for the personnel handling the rated load for these operations is established in 2-9/3i). This provides a dynamic factor of at least 4.0 against allowable stresses (i.e., Personnel Design Load to be 4 times the SWL) and at least a safety factor of 6.0 against yield for structural components (i.e., Allowable stress to be times the yield point). ABS GUIDE FOR CERTIFICATION OF LIFTING APPLIANCES